The Parker CPI/A-lok Series high integrity quick coupling design can be used in modest vacuum (50 millitorr) as well as pressures to 3000 psi. The CPI/A-lok Series is 100% leak tested to an integrity of 1x10(-6) cc/sec max, and is available in a choice of either CPI single ferrule or A-lok double ferrule tube fittings. These quick couplers do not contain any solid lubricants that can contaminate samples and give faulty analyzer readings.